CN105547715B - Method for testing wheel force transfer function in whole vehicle state - Google Patents
Method for testing wheel force transfer function in whole vehicle state Download PDFInfo
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Abstract
本发明提供了一种整车状态下车轮力传递函数测试方法，包括以下步骤：安装测试设备；布置轮心加速度计和胎顶加速度计；连接测试系统；计算轮心加速度计信号对力锤激励信号的传递函数；轮胎顶部加速度计信号对力锤激励信号的传递函数；计算车轮力传递函数。本发明可以一次性地获得车轮轮心位置处的三个方向激励力响应；尽可能地实现了通过激励车轮轮心来获得胎皮振动响应的目的，更加真实地模拟了车轮实际的受力方式；使得整个试验更加方便、接近实际。
The present invention provides a method for testing the wheel force transfer function in a complete vehicle state, comprising the following steps: installing the test equipment; arranging the wheel center accelerometer and the tire top accelerometer; connecting the test system; calculating the transfer function of the wheel center accelerometer signal to the hammer excitation signal; the transfer function of the tire top accelerometer signal to the hammer excitation signal; and calculating the wheel force transfer function. The present invention can obtain the three-directional excitation force response at the wheel center position at one time; achieves the purpose of obtaining the tire skin vibration response by exciting the wheel center as much as possible, and more realistically simulates the actual force mode of the wheel; and makes the entire test more convenient and close to reality.
Description
技术领域technical field
本发明属于汽车NVH试验技术领域，尤其是涉及一种整车状态下车轮力传递函数测试方法及装置。The invention belongs to the technical field of automobile NVH tests, and in particular relates to a method and device for testing a wheel force transfer function in a complete vehicle state.
背景技术Background technique
随着我国汽车产量和汽车保有量的增加，我国汽车法规对汽车安全性能提出了更严格的要求，同时顾客对汽车的品质越来越关注，NVH(N-noise， V-vibration，H-Harshness)噪声振动舒适性逐渐成为决定汽车品质感最重要的指标。为了准确地定义与描述车辆NVH性能，汽车NVH试验技术应运而生。With the increase of my country's automobile production and car ownership, my country's automobile regulations have put forward stricter requirements for automobile safety performance. At the same time, customers are paying more and more attention to the quality of automobiles. NVH (N-noise, V-vibration, H-Harshness ) Noise and vibration comfort has gradually become the most important indicator to determine the quality of the car. In order to accurately define and describe the vehicle NVH performance, the vehicle NVH test technology came into being.
车轮系统最主要的功能是传递作用在路面与悬架之间的力，并缓和汽车行驶过程中来自路面不平度产生的冲击振动，衰减由此引起的振动，以保证汽车的行驶平顺性及车内NVH性能。The main function of the wheel system is to transmit the force acting between the road surface and the suspension, and to alleviate the impact vibration caused by the unevenness of the road surface during the driving process of the car, and attenuate the vibration caused by it, so as to ensure the smoothness of the car and the smoothness of the car. Internal NVH performance.
整车状态下的车轮力传递函数测试方法，考虑了车身对车轮的预载作用，以及悬架系统对车轮的稳定与支撑作用，对于研究路面激励对车内NVH 影响更加具有指导意义。The wheel force transfer function test method under the vehicle state considers the preload effect of the body on the wheel and the stability and support of the suspension system on the wheel, which is more instructive for the study of the influence of road excitation on the NVH in the vehicle.
现有的测试车轮力传递函数过程中存在两个难题：一是无法直接获取车轮近轮心位置处振动数值，二是力锤无法直接激振车轮近轮心位置处。There are two problems in the existing process of testing the force transfer function of the wheel: one is that the vibration value at the position near the center of the wheel cannot be directly obtained, and the other is that the hammer cannot directly vibrate the position near the center of the wheel.
发明内容Contents of the invention
有鉴于此，本发明旨在提出一种整车状态下车轮力传递函数测试方法及装置，以实现触发一次即可获得近轮心位置处振动加速度与胎顶振动加速度数值，从而获得车轮力传递函数。In view of this, the present invention aims to propose a method and device for testing the wheel force transfer function in the vehicle state, so as to obtain the vibration acceleration at the position near the center of the wheel and the vibration acceleration value at the top of the tire after one trigger, so as to obtain the wheel force transfer function. function.
为达到上述目的，本发明的技术方案是这样实现的：In order to achieve the above object, technical solution of the present invention is achieved in that way:
一种整车状态下车轮力传递函数测试方法，包括如下步骤：A method for testing a wheel force transfer function in a complete vehicle state, comprising the following steps:
(1)测试设备安装：将实验车辆停在平整的水平面上，在车轮的轮毂处安装车轮力函数测试装置，车轮力传递函数测试装置包括与轮心同轴的圆盘以及安装在圆盘圆心位置的凸台，在凸台的顶面上布置轮心加速度计，在轮胎顶部胎顶加速度计，将轮心加速度计和胎顶加速度计通过连接线连接到数据采集器的输入端，同时将力触发装置连接到数据采集器的输入端，数据采集器的输出端通过连接线连接至计算机；(1) Test equipment installation: park the experimental vehicle on a flat level surface, install the wheel force function test device at the hub of the wheel, the wheel force transfer function test device includes a disc coaxial with the wheel center and a disc installed at the center of the disc. position of the boss, arrange the wheel center accelerometer on the top surface of the boss, and connect the wheel center accelerometer and the tire top accelerometer to the input terminal of the data collector through the connecting line at the top of the tire. The force trigger device is connected to the input end of the data collector, and the output end of the data collector is connected to the computer through a connecting line;
(2)计算轮心加速度计信号对力触发装置激励信号的传递函数 HX10/HY10/HZ10以及胎顶加速度计信号对力触发装置激励信号的传递函数 HX20/HY20/HZ20：(2) Calculate the transfer function H X10 /H Y10 /H Z10 of the wheel center accelerometer signal to the excitation signal of the force trigger device and the transfer function H X20 /H Y20 /H Z20 of the tire top accelerometer signal to the excitation signal of the force trigger device:
用力触发装置分别锤击凸台的顶面、下边缘和右侧面，获得三个方向的力触发装置激励信号，同时利用数据采集器记录三个方向的力触发装置激励信号HX0/HY0/HZ0，以及轮心加速度计在三个方向的响应信号HX1/HY1/HZ1，以及轮胎顶部加速度计在三个方向的响应信号HX2/HY2/HZ2，用轮心加速度计响应信号与力触发装置激励信号的比值表示轮心点对力触发装置激励信号的传递函数HX10/HY10/HZ10，用胎顶加速度计响应信号与力触发装置激励信号的比值表示胎顶加速度计信号对力锤激励信号的传递函数HX20/HY20/HZ20；Use the force trigger device to hammer the top surface, lower edge and right side of the boss respectively to obtain the excitation signals of the force trigger device in three directions, and use the data collector to record the excitation signals H X0 /H Y0 of the force trigger device in three directions /H Z0 , and the response signals H X1 /H Y1 /H Z1 of the wheel center accelerometer in the three directions, and the response signals H X2 /H Y2 /H Z2 of the tire top accelerometer in the three directions, using the wheel center acceleration The ratio of the response signal of the gauge to the excitation signal of the force trigger device represents the transfer function H X10 /H Y10 /H Z10 of the wheel center point to the excitation signal of the force trigger device, and the ratio of the response signal of the tire top accelerometer to the excitation signal of the force trigger device represents the tire The transfer function H X20 /H Y20 /H Z20 of the top accelerometer signal to the hammer excitation signal;
(3)按照下式计算得到车轮轮心到轮胎顶部胎面的力传递函数，即车轮力传递函数：(3) According to the following formula, the force transfer function from the wheel center to the top tread of the tire is obtained, that is, the wheel force transfer function:
进一步的，所述步骤(1)中轮心加速度计安装在凸台的圆心处，并且轮心加速度计的几何中心与圆盘的圆心共轴，胎顶加速度计位于车轮胎顶与胎皮相切位置。Further, in the step (1), the wheel center accelerometer is installed at the center of the boss, and the geometric center of the wheel center accelerometer is coaxial with the center of the disc, and the tire top accelerometer is located at the top of the tire and is tangent to the tire skin. Location.
相对于现有技术，本发明所述一种整车状态下车轮力传递函数测试方法具有以下优势：Compared with the prior art, a method for testing the wheel force transfer function in the vehicle state according to the present invention has the following advantages:
(1)车轮力传递函数测试装置使得力触发位置与轮心加速度计尽可能靠近地轮心，仅需要布置2个振动加速度计，力锤仅需作用1次即可获得轮心加速度响应、胎顶加速度响应，从而得到车轮力传递函数；(1) The test device for the wheel force transfer function makes the force trigger position and the wheel center accelerometer as close as possible to the ground wheel center. Only two vibration accelerometers need to be arranged. Acceleration response of the top, so as to obtain the wheel force transfer function;
(2)考虑到车轮轮毂结构形状的差异性，该方法可以确保每次激励位置为车轮轮心所在轴与激励位置处加速度计位置的一致性；(2) Considering the difference in the structural shape of the wheel hub, this method can ensure that the excitation position is the consistency of the axis where the wheel hub is located and the position of the accelerometer at the excitation position;
(3)设计了一套与车轮连接的力传递函数测试装置，该装置主要解决了车轮隔振测试的两个关键问题，其一可以一次性地获得车轮轮心位置处的三个方向激励力响应；其二，尽可能地实现了通过激励车轮轮心来获得胎皮振动响应的目的，更加真实地模拟了车轮实际的受力方式；使得整个试验更加方便、接近实际；(3) A set of force transfer function test device connected to the wheel is designed. This device mainly solves two key problems in the wheel vibration isolation test. One can obtain the excitation force in three directions at the center of the wheel at one time. Second, the purpose of obtaining the tire skin vibration response by exciting the wheel center is achieved as much as possible, and the actual force mode of the wheel is more realistically simulated; making the whole test more convenient and close to reality;
(4)整车状态下车轮力传递函数测试方法更加接近车轮实际受到载荷情况，针对性较强。(4) The test method of the wheel force transfer function in the vehicle state is closer to the actual load on the wheel, and is more pertinent.
本发明的另一目的在于提出一种整车状态下车轮力传递函数测试装置，以实现触发一次即可获得近轮心位置处振动加速度与胎顶振动加速度数值，从而获得车轮力传递函数。Another object of the present invention is to propose a wheel force transfer function testing device in the vehicle state, so as to obtain the vibration acceleration at the position near the wheel center and the vibration acceleration value at the top of the tire after one trigger, so as to obtain the wheel force transfer function.
为达到上述目的，本发明的技术方案是这样实现的：In order to achieve the above object, technical solution of the present invention is achieved in that way:
一种整车状态下车轮力传递函数测试装置，包括试验车辆、安装在试验车辆车轮轮毂处的车轮力传递函数测试装置、安装在车轮力传递函数测试装置上的轮心加速度计、安装在车轮胎顶处的胎顶加速度计、力触发装置、数据采集器以及计算机；所述车轮力传递函数测试装置包括圆盘以及安装在圆盘圆心处的凸台，凸台圆心与圆盘圆心共轴；所述轮心加速度计、胎顶加速度计通过连接线连接到数据采集器的输入端；所述力触发装置连接至数据采集器的输入端；所述数据采集器的输出端连接所述计算机。A wheel force transfer function testing device in a complete vehicle state, comprising a test vehicle, a wheel force transfer function test device installed at the wheel hub of the test vehicle, a wheel center accelerometer installed on the wheel force transfer function test device, a wheel center accelerometer installed on the vehicle A tire top accelerometer, a force trigger device, a data collector and a computer at the top of the tire; the wheel force transfer function testing device includes a disc and a boss installed at the center of the disc, and the center of the boss is coaxial with the center of the disc ; The wheel center accelerometer and the tire top accelerometer are connected to the input of the data collector by connecting wires; the force trigger device is connected to the input of the data collector; the output of the data collector is connected to the computer .
进一步的，所述圆盘通过内六角紧固螺栓与轮毂装配一起，所述圆盘上还设有微调连接孔，用于微调圆盘。Further, the disc is assembled with the hub through hexagon socket bolts, and a fine-tuning connection hole is provided on the disc for fine-tuning the disc.
进一步的，所述轮心加速度计安装在凸台的圆心处，并且轮心加速度计的几何中心与圆盘的圆心共轴，胎顶加速度计位于车轮胎顶与胎皮相切位置。Further, the wheel center accelerometer is installed at the center of the boss, and the geometric center of the wheel center accelerometer is coaxial with the center of the disc, and the tire top accelerometer is located at the tangent position between the tire top and the tire skin.
进一步的，所述轮心加速度计为三轴加速度传感器。Further, the wheel center accelerometer is a three-axis acceleration sensor.
进一步的，所述胎顶加速度计为三轴加速度传感器。Further, the tire top accelerometer is a three-axis acceleration sensor.
进一步的，所述轮心加速度计通过粘合胶与所述凸台相粘合。Further, the wheel center accelerometer is bonded to the boss by adhesive glue.
进一步的，所述胎顶加速度计通过粘合胶与所述凸台相粘合。Further, the tire top accelerometer is bonded to the boss through adhesive glue.
进一步的，所述力触发装置为力锤。Further, the force trigger device is a hammer.
所述一种整车状态下车轮力传递函数测试装置与上述一种整车状态下车轮力传递函数测试方法相对于现有技术所具有的优势相同，在此不再赘述。The device for testing the wheel force transfer function in the complete vehicle state has the same advantages as the above-mentioned method for testing the wheel force transfer function in the complete vehicle state compared to the prior art, and will not be repeated here.
附图说明Description of drawings
构成本发明的一部分的附图用来提供对本发明的进一步理解，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：The drawings constituting a part of the present invention are used to provide a further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention. In the attached picture:
图1为本发明实施例所述的一种整车状态下车轮力传递函数装置测试图；Fig. 1 is a test diagram of a wheel force transfer function device in a complete vehicle state according to an embodiment of the present invention;
图2为本发明实施例所述的车轮力传递函数测试装置的主视图；Fig. 2 is the front view of the wheel force transfer function testing device described in the embodiment of the present invention;
图3为本发明实施例所述的车轮力传递函数测试装置的侧视图；Fig. 3 is a side view of the wheel force transfer function test device described in the embodiment of the present invention;
图4为本发明实施例所述的车轮力传递函数测试装置的装配主视图；Fig. 4 is an assembly front view of the wheel force transfer function test device described in the embodiment of the present invention;
图5为本发明实施例所述的车轮力传递函数测试装置的装配侧视图；Fig. 5 is an assembly side view of the wheel force transfer function testing device according to the embodiment of the present invention;
图6为本发明实施例所述的连接体的结构示意图。Fig. 6 is a schematic structural diagram of the linker described in the embodiment of the present invention.
附图标记说明：Explanation of reference signs:
1-车轮力函数测试装置；2-轮心加速度计；3-胎顶加速度计；4-力锤； 5-数据采集器；6-计算机；10-盘体；11-连接体；12-紧固螺母；101-圆盘； 102-凸台；103-连接孔。1-wheel force function test device; 2-wheel center accelerometer; 3-tire top accelerometer; 4-force hammer; 5-data collector; 6-computer; Fixed nut; 101-disc; 102-boss; 103-connecting hole.
具体实施方式Detailed ways
需要说明的是，在不冲突的情况下，本发明中的实施例及实施例中的特征可以相互组合。It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.
在本发明的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。此外，术语“第一”、“第二”等仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”等的特征可以明示或者隐含地包括一个或者更多个该特征。在本发明的描述中，除非另有说明，“多个”的含义是两个或两个以上。In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, a feature defined as "first", "second", etc. may expressly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "plurality" means two or more.
在本发明的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以通过具体情况理解上述术语在本发明中的具体含义。In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention based on specific situations.
下面将参考附图并结合实施例来详细说明本发明。The present invention will be described in detail below with reference to the accompanying drawings and examples.
如图1所示的一种整车状态下车轮力传递函数测试图，测试方法包括以下步骤：As shown in Figure 1, a test diagram of wheel force transfer function under a complete vehicle state, the test method includes the following steps:
(1)调整车辆车轮位置(1) Adjust the vehicle wheel position
将试验车辆移动至地面平整的实验室，尽量保证前后车轮两车轴所在平面平行于地面，使车辆待测车轮(后左车轮)状态与实际路面状态一致。Move the test vehicle to a laboratory with flat ground, and try to ensure that the planes of the front and rear wheel axles are parallel to the ground, so that the state of the vehicle's wheels to be tested (rear left wheel) is consistent with the actual road state.
(2)安装车轮力传递函数测试装置1(2) Install wheel force transfer function test device 1
车轮力传递函数测试装置1如图2、3所示，车轮力传递函数测试装置1 包括盘体10、连接体11以及紧固螺母12，盘体包括圆盘101、凸台102以及连接孔103，凸台102圆心与圆盘101圆心共轴，连接体11如图5所示；Wheel force transfer function testing device 1 as shown in Figures 2 and 3, wheel force transfer function testing device 1 includes a disc body 10, a connecting body 11 and a fastening nut 12, and the disc body includes a disc 101, a boss 102 and a connecting hole 103 , the center of the boss 102 is coaxial with the center of the disk 101, and the connecting body 11 is shown in Figure 5;
车轮力传递函数测试装置1装配图如图3、4所示，采用车辆自带起重装置将车身支起，使后左车轮脱离地面，离地高度约5cm。将车轮5个紧固螺栓松开拿下后，将5个连接体11通过连接孔103与刹车盘自带螺栓连接并紧固，之后将盘体10按照连接孔103位置装上，通过紧固螺母12与连接体11连接螺纹之间的连接关系将盘体10与车轮轮毂紧密贴合在一起，使得车轮力传递函数测试装置1受到激励力可以通过载体盘体10传递到车轮本身。车轮力传递函数测试装置1安装之后，将后左车轮缓缓放下，使其接触到地面，移开起重装置。The assembly diagram of the wheel force transfer function test device 1 is shown in Figures 3 and 4. The vehicle body is supported by the vehicle's own lifting device, so that the rear left wheel is off the ground, and the height from the ground is about 5cm. After loosening and removing the 5 fastening bolts of the wheel, connect and fasten the 5 connecting bodies 11 with the bolts of the brake disc through the connecting holes 103, and then install the disc body 10 according to the position of the connecting holes 103, and tighten The connecting relationship between the nut 12 and the connecting thread of the connecting body 11 makes the disk body 10 and the wheel hub closely fit together, so that the excitation force of the wheel force transfer function testing device 1 can be transmitted to the wheel itself through the carrier disk body 10 . After the wheel force transfer function testing device 1 is installed, the rear left wheel is slowly put down so that it touches the ground, and the lifting device is removed.
(3)布置轮心与胎顶加速度计(3) Arrange wheel center and tire top accelerometer
布置车轮轮心加速度计2，将轮心加速度计2通过粘合剂粘结到盘体10 的凸台102平面上，轮心加速度计2为三轴加速度计传感器，轮心加速度计 2布置在凸台102的中心位置，使得轮心加速度计2的X向经过左后车轮轮心，平行于地面，朝向车头方向；轮心加速度计2的Y向沿着试验车辆两后车轮轮心方向，方向指向后右车轮方向；轮心加速度计2的Z向垂直于地面，方向竖直向上；The wheel center accelerometer 2 is arranged, and the wheel center accelerometer 2 is bonded to the boss 102 plane of the disc body 10 by an adhesive. The wheel center accelerometer 2 is a three-axis accelerometer sensor, and the wheel center accelerometer 2 is arranged on the The central position of the boss 102 is such that the X direction of the wheel center accelerometer 2 passes through the left rear wheel center, parallel to the ground, and faces the direction of the front of the vehicle; the Y direction of the wheel center accelerometer 2 is along the direction of the wheel center of the two rear wheels of the test vehicle, The direction points to the direction of the rear right wheel; the Z direction of the wheel center accelerometer 2 is perpendicular to the ground, and the direction is vertically upward;
布置胎顶加速度计3，将胎顶加速度计3通过粘合剂粘结到轮胎胎顶位置，胎顶加速度计3为三轴加速度传感器，胎顶加速度计3布置在轮胎胎顶面，使得胎顶加速度计3的X向与轮心加速度计X向平行，指向相同，且胎顶加速度计3与胎顶相切；胎顶加速度计3的Y向与轮心加速度计2的Y向平行，指向相同，且胎顶加速度计3中心位置经过轮胎纵面中心线；胎顶加速度计3的Z向与轮心加速度计2的Z向平行，指向相同，且Z向与胎皮相切。The tire top accelerometer 3 is arranged, and the tire top accelerometer 3 is bonded to the tire top position by an adhesive. The tire top accelerometer 3 is a three-axis acceleration sensor, and the tire top accelerometer 3 is arranged on the tire top surface, so that the tire The X direction of the top accelerometer 3 is parallel to the X direction of the wheel center accelerometer, with the same direction, and the tire top accelerometer 3 is tangent to the tire top; the Y direction of the tire top accelerometer 3 is parallel to the Y direction of the wheel center accelerometer 2, The directions are the same, and the center position of the top accelerometer 3 passes through the longitudinal centerline of the tire; the Z direction of the top accelerometer 3 is parallel to the Z direction of the wheel center accelerometer 2, has the same direction, and the Z direction is tangent to the tire skin.
(4)连接测试系统(4) Connect to the test system
分别将轮心加速度计3与胎顶加速度计2连接到数据采集器5，同时将力锤4连接到数据采集器5，数据采集器5通过连接线连接计算机6，数据采集器5具有中央处理器(CPU)、只读存储器(ROM)、可读写存储器(RAM)、屏幕显示器、键盘、与计算机接口，通过接口与计算机6连接。Connect the wheel center accelerometer 3 and tire top accelerometer 2 to the data collector 5 respectively, and simultaneously connect the force hammer 4 to the data collector 5, and the data collector 5 is connected to the computer 6 through a connection line, and the data collector 5 has a central processing Device (CPU), read-only memory (ROM), readable and writable memory (RAM), screen display, keyboard, and computer interface, are connected with computer 6 by interface.
(5)计算轮心点对力锤激励信号的传递函数HX10/HY10/HZ10以及胎顶加速度计信号对力锤激励信号的传递函数HX20/HY20/HZ20：(5) Calculate the transfer function H X10 /H Y10 /H Z10 of the wheel center point to the hammer excitation signal and the transfer function H X20 /H Y20 /H Z20 of the tire top accelerometer signal to the hammer excitation signal:
用力锤4分别锤击凸台102的X/Y/Z三个方向，凸台102的X/Y/Z三个方向与轮心加速度计2的X/Y/Z三个方向一致，获得力锤激励信号，同时利用数据采集器5记录力锤4激励信号HX0/HY0/HZ0，以及轮心加速度计的响应信号HX1/HY1/HZ1，以及胎顶加速度计信号的HX2/HY2/HZ2，用轮心加速度计的响应信号与力锤激励信号的比值表示轮心点对力锤的激励信号的传递函数 HX10/HY10/HZ10，用胎顶加速度计的响应信号与力锤的激励信号的比值表示胎顶加速度计的响应信号对力锤的激励信号的传递函数HX20/HY20/HZ20；Hammer the X/Y/Z three directions of the boss 102 respectively with a force hammer 4, and the X/Y/Z three directions of the boss 102 are consistent with the X/Y/Z three directions of the wheel center accelerometer 2 to obtain force At the same time, use the data collector 5 to record the excitation signal H X0 /H Y0 /H Z0 of the hammer 4, the response signal H X1 /H Y1 /H Z1 of the wheel center accelerometer, and the H of the tire top accelerometer signal. X2 /H Y2 /H Z2 , using the ratio of the response signal of the wheel center accelerometer to the excitation signal of the hammer to represent the transfer function of the wheel center point to the excitation signal of the hammer H X10 /H Y10 /H Z10 , using the tire top accelerometer The ratio of the response signal and the excitation signal of the hammer represents the transfer function H X20 /H Y20 /H Z20 of the response signal of the tire top accelerometer to the excitation signal of the hammer;
(6)按照下式计算得到车轮轮心到轮胎顶部台面的力传递函数，即车轮力传递函数：(6) According to the following formula, the force transfer function from the wheel center to the top surface of the tire is obtained, that is, the wheel force transfer function:
本发明实施例提供了一种整车状态下车轮力传递函数测试方法，与其他轮胎车轮力传递函数测试方法相比较，本专利针对车轮力传递率测试设计一套车轮力传递函数测试装置，应用该装置简化了车轮力传递函数测试过程，仅需力锤敲击一次，即可获得车轮力传递函数；同时确保了每次测试获得车轮轮心位置处振动水平的稳定性；另外，车轮力传递函数测试装置使得X/Y/Z 三个方向的激振更加方便与准确。The embodiment of the present invention provides a method for testing the wheel force transfer function in the vehicle state. Compared with other test methods for the wheel force transfer function of the tire, this patent designs a set of wheel force transfer function test device for the test of the wheel force transfer rate. The device simplifies the test process of the wheel force transfer function, and the wheel force transfer function can be obtained by only hitting the force hammer once; at the same time, it ensures the stability of the vibration level at the center of the wheel for each test; in addition, the wheel force transfer The function test device makes the excitation in the three directions of X/Y/Z more convenient and accurate.
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of the present invention. within the scope of protection.
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| CN110879872B (en) * | 2019-11-15 | 2021-09-17 | 中国科学院长春光学精密机械与物理研究所 | Vehicle system transfer function solving method based on transfer matrix |
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| CN113390653A (en) * | 2021-07-15 | 2021-09-14 | 东风汽车集团股份有限公司 | Wheel force transfer rate testing method and system |
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